A dyeing process for improving floating color and color stains on fabrics

Abstract

The present application relates to the field of textile technology, and more specifically, it relates to a dyeing process for improving fabric floating color and color stains. A dyeing process for improving fabric floating color and color stains comprises the following steps: pre-shrinking: first immersing the grey cloth in water, then immersing it in a first degreasing agent aqueous solution, and finally washing it with water to obtain a pre-shrinked grey cloth; the degreasing agent in the first degreasing agent aqueous solution is degreasing agent DO-1173; degreasing: immersing the pre-shrinked grey cloth in a second degreasing agent aqueous solution, and then washing it with water to obtain a degreasing grey cloth; dyeing: dyeing the degreasing grey cloth in a dye bath to obtain a dyed grey cloth; reduction cleaning: performing reduction cleaning on the dyed grey cloth to obtain a grey cloth treated by a dyeing process. The dyeing process of the present application can reduce the oil content of the grey cloth, reduce the influence of oil stains on the surface of the grey cloth on the coloring of the grey cloth, and effectively improve the problem of floating color and color stains after fabric dyeing.

Description

Technical Field

[0001] The present application relates to the field of textile technology, and more specifically, to a dyeing process for improving floating color and color stains on fabrics. Background Art

[0002] Fabric is the material used to make clothing. Fabric can not only interpret the style and characteristics of clothing, but also directly influence the expression of clothing color and shape.

[0003] At present, the preparation process of fabrics includes three major processes: the first is the weaving process, which is to weave the yarn on a loom to obtain the grey cloth; the second is the dyeing process, which is to color the grey cloth with dyes or pigments to give the grey cloth a specific color and obtain the grey cloth with a specific color; the third is the post-finishing process, which is to improve the appearance and internal quality of the grey cloth by subjecting the grey cloth with a specific color to physical and chemical processing, thereby improving the wearability of the resulting fabric or giving it special functions.

[0004] Since commercially available yarns generally have oil stains on their surfaces, the surface of grey fabrics woven with yarns with oil stains will also have oil stains. If grey fabrics with oil stains are directly dyed, the oil stains will affect the dye or pigment's coloring of the grey fabric, and the resulting fabrics will have floating colors and color stains. Although degreasing agents are now used to degrease grey fabrics with oil stains before dyeing, the degreasing effect is not obvious, and the fabrics still have floating colors and color stains. Summary of the invention

[0005] In order to improve the problem of floating color and color stains on fabrics, the present application provides a dyeing process for improving floating color and color stains on fabrics.

[0006] The present application provides a dyeing process for improving floating color and color stains on fabrics, using the following technical solutions:

[0007] A dyeing process for improving floating color and color stains on fabrics, comprising the following steps:

[0008] S1 pre-shrinking: first immersing the grey cloth in water, then immersing it in a first degreasing agent aqueous solution, and finally washing it with water to obtain a pre-shrunk grey cloth;

[0009] The deoiling agent in the first deoiling agent aqueous solution is deoiling agent DO-1173;

[0010] S2 degreasing: the grey cloth pre-shrunk in S1 is immersed in a second degreasing agent aqueous solution, and then washed with water to obtain a degreasing grey cloth;

[0011] S3 dyeing: dyeing the grey cloth treated with degreasing in S2 in a dye bath to obtain a dyed grey cloth;

[0012] S4 reduction cleaning: The dyed grey cloth is subjected to reduction cleaning to obtain the grey cloth treated by the dyeing process.

[0013] By adopting the above technical scheme, in the dyeing process of fabrics, the grey cloth is first pre-shrunk, and then degreased and dyed. Since the degreaser DO-1173 used in the pre-shrunk step is first impregnated into the grey cloth, the oil stains in the grey cloth fibers can be better emulsified and the oil stains can be dispersed in water, and then the oil stains can be washed out by water, which effectively reduces the oil content of the grey cloth. Subsequently, the pre-shrunk grey cloth is degreased again, which further reduces the oil content of the grey cloth. Therefore, when the grey cloth that has been pre-shrunk and degreased is dyed again, because the oil content of the grey cloth is low, the influence of the oil stains on the surface of the grey cloth on the coloring of the grey cloth is reduced, and the problem of floating color and color stains on the fabric due to dyeing is effectively improved.

[0014] Preferably, in the S1 pre-shrinkage, the concentration of the first degreasing agent aqueous solution is 0.5-2 g / L.

[0015] By adopting the above technical scheme, when the grey cloth is pre-shrunk, the deoiling agent in the first deoiling agent aqueous solution of the above concentration has good dispersibility in water, which is beneficial to emulsify the oil stains on the surface of the grey cloth, further reducing the oil content of the grey cloth, thereby improving the problems of floating color and color stains on the fabric.

[0016] Preferably, in the S1 pre-shrinking, the grey cloth is first immersed in water at a temperature of 40-60°C for 10-20 minutes, then immersed in a first degreasing agent aqueous solution at a temperature of 40-60°C for 5-10 minutes, and finally washed with water to obtain the pre-shrunk grey cloth.

[0017] By adopting the above technical solution, since the degreasing agent has good solubility in the above temperature range, the dispersion performance of the degreasing agent on the surface of the grey cloth can be improved, which is conducive to reducing the oil content of the grey cloth, thereby improving the problem of floating color and color stains on the fabric. At the same time, the above temperature has little effect on the style of the grey cloth itself, which is conducive to reducing the damage to the grey cloth.

[0018] Preferably, in the S2 dyeing, the deoiling agent in the second deoiling agent aqueous solution is deoiling agent DO-1173, and the concentration of the second deoiling agent aqueous solution is 0.5-2 g / L.

[0019] By adopting the above technical scheme, the degreasing agent DO-1173 has a better emulsification effect on the oil stains in the grey cloth fibers, which can promote the dispersion of the oil stains in the grey cloth fibers in water, and then remove the oil stains by water washing, further reducing the oil content in the grey cloth.

[0020] Preferably, in the S2 degreasing, the grey cloth pre-shrunk in S1 is immersed in a second degreasing agent aqueous solution at a temperature of 80-90°C for 20-30 minutes, then immersed in water at a temperature of 40-60°C for 10-20 minutes, and finally immersed in water at a temperature of 25-40°C for 10-20 minutes to obtain the degreasing grey cloth.

[0021] By adopting the above technical solution, the degreasing agent has good solubility at 80-90°C, which is conducive to improving the dispersion performance of the degreasing agent on the surface of the grey cloth. At the same time, the grey cloth is first impregnated with water at 40-60°C, and then with water at 25-40°C, which is conducive to promoting the dispersion of oil stains in the grey cloth in the water, thereby reducing the oil content of the grey cloth and further improving the problems of floating color and color stains on the fabric.

[0022] Preferably, in the S3 dyeing, multifunctional synergist DO-3916, degreaser DO-1173, chelating agent CA-170 and dispersant C powder are added to water, stirred and mixed, and then dye is added and stirred and mixed to obtain a dye bath.

[0023] By adopting the above technical scheme, the dye bath composed of the multifunctional synergist DO-3916, the degreasing agent DO-1173, the chelating agent CA-170, the dispersant C powder, the dye and water has good permeability to the grey cloth, especially after the multifunctional synergist DO-3916, the degreasing agent DO-1173 and the dispersant C powder are mixed in the dye bath, they can penetrate into the grey cloth and remove the dye agglomerates remaining on the surface of the grey cloth, which is beneficial to reduce the floating color and color stains on the fabric.

[0024] Preferably, in the S3 dyeing, the concentration of the multifunctional synergist DO-3916 in the water is 1-2 g / L, the concentration of the degreasing agent DO-1173 in the water is 0.5-1 g / L, and the concentration of the dispersant C powder in the water is 0.5-1 g / L.

[0025] By adopting the above technical scheme, the multifunctional enhancer DO-3916, degreaser DO-1173 and dispersant C powder have good dispersibility in water, are dispersed on the surface of the grey cloth and penetrate into the grey cloth, remove the dye agglomerates remaining on the surface of the grey cloth, and are beneficial to reduce floating color and color stains on the fabric.

[0026] Preferably, in the S3 dyeing, the temperature and time of the S2 degreasing treated grey cloth in the dye bath are controlled as follows:

[0027] First, increase the temperature from 50°C to 70°C at a heating rate of 0.5-1.0°C / min, then increase the temperature from 70°C to 110°C at a heating rate of 0.5-1.0°C / min, and keep it warm for 10-20 minutes; then increase the temperature from 110°C to 130°C at a heating rate of 0.3-1.0°C / min, and keep it warm for 30-45 minutes; finally, decrease the temperature from 130°C to 80°C at a cooling rate of 1-2°C / min.

[0028] By adopting the above technical solution, during the dyeing process, the temperature is increased gradually, especially the temperature is increased slowly in the range of 50℃-110℃, and the temperature is kept at 110℃ for 10-20min, which is conducive to uniform coloring of the grey cloth fibers and reduces floating color and color stains on the fabric. At the same time, it can effectively solve the problem of large changes in fabric style caused by inconsistent heat shrinkage of each yarn, and improve the dimensional stability of the final fabric pattern.

[0029] In summary, this application has the following beneficial effects:

[0030] 1. In the dyeing process of fabrics, since the degreasing agent DO-1173 has a good emulsifying effect on the oil stains in the grey cloth fibers, the grey cloth is first immersed in the first degreasing agent aqueous solution in the pre-shrinking step, and then treated with the second degreasing agent aqueous solution in the degreasing step. By emulsifying the oil stains in the grey cloth fibers twice, the degreasing effect on the grey cloth is improved, the influence of the oil stains on the surface of the grey cloth on the coloring of the grey cloth is reduced, and the problem of floating color and color stains on the fabric due to dyeing is effectively improved;

[0031] 2. During dyeing, the multifunctional synergist DO-3916, degreaser DO-1173 and dispersant C powder in the dye bath can penetrate into the fibers of the grey cloth, remove the residual dye agglomerates on the surface of the grey cloth fibers, and reduce floating colors and color stains on the fabrics;

[0032] 3. During the dyeing process, a slow heating rate is used in the range of 50℃-110℃, and the temperature is kept at 110℃ for 10-20min. This is conducive to uniform coloring of the grey cloth fibers, reducing floating color and color stains on the fabric, and effectively reducing the probability of defective fabrics. DETAILED DESCRIPTION

[0033] The present application is further described in detail below with reference to the embodiments.

[0034] Performance testing:

[0035] The fabrics obtained in the examples and comparative examples of the present application were tested for floating color and color stains, and the testing method was as follows:

[0036] Samples to be tested: fabrics obtained in the examples and comparative examples.

[0037] Specifications of the sample to be tested: length 62m, width 162cm, weight 187g / m 2 .

[0038] Testing method: The total score when there is no floating color or color stain on the fabric is 100 points. Visually inspect the fabric of the sample to be tested for floating color or color stain, and deduct points according to the standards in the table below. The higher the score, the less floating color and color stain.

[0039] Points Fabric condition 1 point There are floating colors and color stains within 7.6cm 2 points There are floating colors and color stains within 7.6-15cm 3 points There are floating colors and color stains within 15-23cm 4 points There are floating colors and color stains over 23cm

[0040] Example

[0041] Example 1

[0042] A dyeing process for improving floating color and color stains on fabrics, comprising the following steps:

[0043] S1 Pre-shrinkage:

[0044] S11 aqueous solution impregnation: according to the bath ratio of grey cloth and water being 1:15, water was added to a pre-shrinking machine (purchased from Risaka (China) Machinery Technology Co., Ltd.), and the grey cloth was immersed in water at 60° C. for 10 minutes to obtain grey cloth impregnated with aqueous solution.

[0045] S12 degreasing agent impregnation: add degreasing agent DO-1173 to the water in S11 to obtain a first degreasing agent aqueous solution with a concentration of 2 g / L; immerse the grey cloth impregnated with the S11 aqueous solution in the first degreasing agent aqueous solution at 60° C. for 5 minutes to obtain a degreasing agent impregnated grey cloth;

[0046] In the examples of the present application, the degreasing agent DO-1173 was purchased from Suzhou Deao Textile Technology Co., Ltd.

[0047] S13 first cleaning: adjusting the pH value of the first degreasing agent aqueous solution in S12 to 7-8 (7 in the embodiment of the present application) to obtain a first degreasing agent aqueous solution with a pH value of 7; immersing the grey cloth impregnated with the degreasing agent in S12 in the first degreasing agent aqueous solution at 60° C. and a pH value of 7 for 5 minutes, heating the temperature to 95° C. at a heating rate of 2° C. / min, and then keeping the temperature for 20 minutes, discharging the degreasing agent aqueous solution with a pH value of 7, and obtaining the grey cloth washed for the first time;

[0048] S14 second cleaning: according to the bath ratio of grey cloth to water being 1:15, water is added to the pre-shrinking machine, the grey cloth cleaned for the first time in S13 is immersed in water at 60° C. for 10 minutes, and the water is drained to obtain the grey cloth cleaned for the second time;

[0049] S15 third cleaning: according to the bath ratio of grey cloth and water being 1:15, water is added to the pre-shrinking machine, and then acetic acid is added to obtain an acetic acid aqueous solution with a concentration of 1g / L; the grey cloth cleaned for the second time in S14 is immersed in an acetic acid aqueous solution at 50°C for 10 minutes, and then drained to obtain the grey cloth cleaned for the third time;

[0050] S16 fourth cleaning: according to the bath ratio of grey cloth to water being 1:15, water is added to the pre-shrinking machine, and the grey cloth cleaned for the third time in S15 is immersed in water at 60° C. for 10 minutes, and then drained to obtain the grey cloth cleaned for the fourth time;

[0051] S17 fifth cleaning: according to the bath ratio of grey cloth to water being 1:15, water is added to the pre-shrinking machine, and the grey cloth cleaned for the fourth time in S16 is immersed in 40° C. water for 10 minutes, and then drained to obtain the pre-shrunk grey cloth.

[0052] The running speed of the grey cloth during preshrinkage is 80-110 s / r (80 s / r in the embodiment of the present application).

[0053] S2 Degreasing:

[0054] S21 degreaser impregnation: according to the bath ratio of the grey cloth and the degreaser aqueous solution of 1:15, first add water, then add the degreaser DO-1173, stir and mix evenly to obtain a second degreaser aqueous solution with a concentration of 1g / L; the grey cloth pre-shrunk by S17 is immersed in the second degreaser aqueous solution at 85°C for 20 minutes, and then the second degreaser aqueous solution is discharged to obtain the grey cloth impregnated with the degreaser.

[0055] S22 first cleaning: add water according to the bath ratio of grey cloth to water of 1:15, then immerse the grey cloth impregnated with S21 degreasing agent in water at 60°C for 10 minutes, drain the water, and obtain the grey cloth for the first cleaning.

[0056] S23 second cleaning: according to the bath ratio of grey cloth to water being 1:15, water is added, and then the grey cloth cleaned for the first time in S22 is immersed in 40° C. water for 10 minutes, and drained to obtain the grey cloth treated with the degreasing agent.

[0057] The running speed of the grey cloth during degreasing is 80-110 s / r (80 s / r in the embodiment of the present application).

[0058] S3 staining:

[0059] At room temperature (20-25° C.), according to the bath ratio of the grey cloth to the dye bath being 1:15, water is first added into the dyeing machine, and then 2 g / L of multifunctional synergist DO-3916, 0.5 g / L of degreasing agent DO-1173, 0.5 g / L of dispersant C powder, 0.5 g / L of chelating agent CA-170, 0.5 g / L of sodium acetate and 0.6 g / L of glacial acetic acid are added, stirred and mixed, and then the temperature is raised to 50° C., and finally 2.65% of dye WF-PT and 0.0042% of dye MEKICRON BLUE RSF bsMEKICRON BLUE RSF bs are added, stirred and mixed, to obtain a dye bath.

[0060] The grey cloth treated with S23 degreasing agent is added into the dye bath to dye the grey cloth, thereby obtaining the dyed grey cloth.

[0061] Among them, the running speed of the grey cloth washed for the second time in S23 in the dye bath is 80-110 s / r (80 s / r in the embodiment of the present application).

[0062] In the examples of the present application, the multifunctional synergist DO-3916 and the dispersant C powder were both purchased from Suzhou Deao Textile Technology Co., Ltd.

[0063] Chelating agent CA-170 was purchased from Kunshan Mingjia Additive Co., Ltd.

[0064] The dye, model number is disperse deep red WF-PT, purchased from Zhejiang Wanfeng Chemical Co., Ltd.

[0065] The dye, model number MEKICRON BLUE RSF bs, was purchased from Jiangsu Dewang Digital Technology Co., Ltd.

[0066] S23 The grey cloth after the second cleaning is in the dye bath, and the temperature and time of the dye bath are controlled as follows:

[0067] First, the temperature was increased from 50°C to 70°C at a heating rate of 1°C / min, and then increased from 70°C to 110°C at a heating rate of 0.5°C / min, and kept warm for 15 min; then the temperature was increased from 110°C to 130°C at a heating rate of 0.5°C / min, and kept warm for 30 min; finally, the temperature was decreased from 130°C to 80°C at a cooling rate of 1.5°C / min to obtain the dyed grey cloth.

[0068] S4 Restore Cleaning:

[0069] According to the bath ratio of the grey cloth and the reducing cleaning aqueous solution of 1:15, water, 3g / L alkaline reducing agent HT-167bs and 6g / L soda ash were added to the dyeing machine, and after stirring and mixing evenly, a reducing cleaning aqueous solution with a pH of 10-11.5 was obtained, and the reducing cleaning aqueous solution was heated to 85°C, and the grey cloth after S23 dyeing was cleaned with the reducing cleaning aqueous solution for 20 minutes, and the reducing cleaning aqueous solution was discharged to obtain the grey cloth treated by the dyeing process.

[0070] Example 2-3

[0071] A dyeing process for improving floating color and color stains on fabrics, which is different from Example 1 in that, in S1 preshrinkage, the concentration of the first degreasing agent aqueous solution is as shown in the following table.

[0072]

[0073] The fabrics obtained in the above Examples 2-3 were tested for floating color and color stains, and the test results are shown in the following table.

[0074]

[0075] It can be seen from the above table that the fabrics obtained in Examples 1-3 of the present application have fabric floating color and color stains as high as 87-95 points, and have good fabric style.

[0076] Embodiment 4-5

[0077] A dyeing process for improving floating color and color stains of fabrics, which is different from Example 1 in that, in S1 preshrinkage, the temperature and time of the grey fabric impregnation are shown in the following table.

[0078]

[0079]

[0080] The fabrics obtained in Examples 4-5 above were tested for floating color and color stains, and the test results are shown in the following table.

[0081]

[0082] It can be seen from the above table that the fabrics obtained in Examples 1, 4 and 5 of the present application have fabric floating color and color stains as high as 91-95 points, and have good fabric style.

[0083] Embodiment 6-9

[0084] A dyeing process for improving floating color and color stains on fabrics, which is different from Example 1 in that, in S2 degreasing, the concentration of the second degreasing agent aqueous solution is as shown in the following table.

[0085]

[0086] The fabrics obtained in Examples 6-9 above were tested for floating color and color stains, and the test results are shown in the following table.

[0087]

[0088] As can be seen from the table above, the fabrics obtained in Examples 1, 6, and 7 of the present application have a floating color and color stain situation of up to 90-97 points, and have a good fabric style. The fabrics obtained in Examples 8 and 9 have a floating color and color stain situation of up to 88-90 points.

[0089] By comparing the fabrics obtained in Examples 8 and 9 with the fabrics obtained in Examples 1, 6, and 7, it can be seen that in the dyeing process of the fabric of the present application, when the concentration of the second degreasing agent aqueous solution is 0.5-2g / L, the oil stains in the grey cloth fibers are emulsified, and the oil stains are promoted to be dispersed in the water, which is conducive to cleaning and removing the oil stains, thereby improving the degreasing efficiency. Although the concentration of the second degreasing agent aqueous solution in Example 9 is increased to 2.5g / L, it may be because the concentration is too high, and after mixing with other auxiliaries in the water during cleaning, geopolymer condensation will be produced, thereby affecting the cleaning efficiency of the emulsified oil stains. This may be the reason why the concentration of the second degreasing agent aqueous solution is high, but the floating color and color stains of the fabric are still serious.

[0090] Example 10

[0091] A dyeing process for improving floating color and color stains of fabrics, which is different from Example 1 in that, in S2 degreasing, an equal amount of degreasing agent HT-NRK is used to replace the degreasing agent DO-1173, wherein the degreasing agent HT-NRK is purchased from Zhangjiagang Hetai Chemical Co., Ltd.

[0092] The fabric obtained in Example 10 was tested for floating color and color stains, and the test results are shown in the following table.

[0093]

[0094] As can be seen from the above table, the fabric obtained in Example 1 of the present application has a higher score for floating color and color stains than the fabric obtained in Example 10, and has fewer floating color and color stains. This shows that in the dyeing process of the fabric of the present application, the use of degreasing agent DO-1173 for degreasing can reduce the floating color and color stains of the fabric. The reason for this may be that the degreasing agent DO-1173 can emulsify the fiber, so that the oil stains in the fiber are dispersed in the water, which is conducive to the discharge of the oil stains, thereby reducing the oil content of the fiber, which is conducive to reducing the floating color and color stains on the fabric.

[0095] Examples 11-12

[0096] A dyeing process for improving floating color and color stains on fabrics, which is different from Example 1 in that, in S2 degreasing, the temperature and time of the grey cloth immersion are shown in the following table.

[0097]

[0098] The fabrics obtained in Examples 11-12 above were tested for floating color and color stains, and the test results are shown in the following table.

[0099]

[0100] As can be seen from the above table, the fabrics obtained in Examples 1, 11, and 12 of the present application have a floating color and color stain situation of up to 93-96 points, and have a good fabric style. This shows that in the dyeing process of the fabric, the grey fabric pre-shrunk by S1 is immersed in the second degreasing agent aqueous solution at a temperature of 80-90°C for 20-30 minutes, then immersed in water at a temperature of 40-60°C for 10-20 minutes, and finally immersed in water at a temperature of 25-40°C for 10-20 minutes, which can reduce the floating color and color stain of the fabric.

[0101] Embodiment 13

[0102] A dyeing process for improving floating color and color stains on fabrics, comprising the following steps:

[0103] S1 Pre-shrinking: The same as in Example 1, to obtain pre-shrinked grey cloth.

[0104] S2 Degreasing:

[0105] S21 aqueous solution impregnation: according to the bath ratio of grey cloth and water being 1:15, water was added, and then the grey cloth treated with S2 degreasing agent was immersed in water at 60°C for 10 minutes, and then the water was drained to obtain water-impregnated grey cloth.

[0106] S22 degreaser impregnation: according to the bath ratio of the grey cloth and the degreaser aqueous solution of 1:15, first add water, and then add the degreaser HT-NRK, stir and mix evenly to obtain a second degreaser aqueous solution with a concentration of 5g / L; the grey cloth impregnated with S21 water is immersed in the second degreaser aqueous solution at 98°C for 30 minutes, and then the second degreaser aqueous solution is discharged to obtain the grey cloth treated with the degreaser.

[0107] S23 first cleaning: add water according to the bath ratio of grey cloth to water of 1:15, then immerse the grey cloth treated with S22 degreasing agent in water at 80°C for 10 minutes, drain the water, and obtain the grey cloth for the first cleaning.

[0108] S24 second washing: according to the bath ratio of grey cloth to water being 1:15, water is added, and then the grey cloth washed for the first time in S23 is immersed in water at 60° C. for 10 minutes, and drained to obtain the grey cloth washed for the second time.

[0109] S25 third cleaning: according to the bath ratio of grey cloth to water being 1:15, water is added, and then the grey cloth cleaned for the first time in S24 is immersed in 40°C water for 10 minutes, and drained to obtain the grey cloth treated for the first time with degreasing.

[0110] Among them, the running speed of the grey cloth during deoiling is 80s / r.

[0111] S3 dyeing: the same as in Example 1, to obtain a dyed grey cloth.

[0112] S4 reduction cleaning: the same as in Example 1, to obtain the grey cloth treated by the dyeing process.

[0113] The fabric obtained in Example 13 above was tested for floating color and color stains, and the test results are shown in the following table.

[0114]

[0115] As can be seen from the above table, the fabric obtained in Example 1 of the present application has a higher score for floating color and color stains than the fabric obtained in Example 13, and has less floating color and color stains. This shows that in the dyeing process of the fabric of the present application, the S2 degreasing step and the degreasing agent DO-1173 cooperate with each other, which is conducive to reducing the oil content in the fiber and reducing the floating color and color stains of the fabric.

[0116] Examples 14-15

[0117] A dyeing process for improving floating color and color stains on fabrics, which is different from Example 1 in that, in S3 dyeing, the concentrations of the multifunctional synergist DO-3916, the third degreasing agent DO-1173 and the dispersant C powder are as shown in the following table.

[0118]

[0119] The fabrics obtained in Examples 14-15 above were tested for floating color and color stains, and the test results are shown in the following table.

[0120]

[0121] It can be seen from the above table that the fabrics obtained in Examples 1, 14 and 15 of the present application have fabric floating color and color stains as high as 93-95 points, and have good fabric style.

[0122] Example 16

[0123] A dyeing process for improving floating color and color stains on fabrics, which is different from Example 1 in that in S3 dyeing, the components in the dye bath and their weights are shown in the following table.

[0124]

[0125]

[0126] In the examples of the present application, the anti-precipitation agent HT-77bs, the repair agent DT-70bs, the chelating agent HT-67bs and the dispersant SDA are all purchased from Zhangjiagang Hetai Chemical Co., Ltd.

[0127] The substitute acid CA-3 was purchased from Kunshan Mingjia Additive Co., Ltd.

[0128] The fabric obtained in Example 16 above was tested for floating color and color stains, and the test results are shown in the following table.

[0129]

[0130] As can be seen from the above table, the fabric obtained in Example 1 of the present application has a higher score for floating color and color stains than the fabric obtained in Example 16, and has fewer floating color and color stains. This shows that in the dyeing process of the fabric of the present application, the dye bath used in dyeing is composed of a mixture of multifunctional synergist DO-3916, degreasing agent DO-1173, chelating agent CA-170, dispersant C powder, dye and water, and the fabric surface style of the obtained fabric is better.

[0131] Examples 17-18

[0132] A dyeing process for improving floating color and color stains of fabrics, which is different from Example 1 in that in S3 dyeing, the grey cloth washed for the second time in S23 is in the dye bath, and the temperature and time of the dye bath are controlled as shown in the following table.

[0133]

[0134] The fabrics obtained in Examples 17-18 above were tested for floating color and color stains. The test results are shown in the following table.

[0135]

[0136] It can be seen from the above table that the fabrics obtained in Examples 1, 17 and 18 of the present application have fabric floating color and color stains as high as 90-92 points, and have good fabric style.

[0137] Embodiment 19

[0138] A dyeing process for improving floating color and color stains of fabrics, which is different from Example 1 in that in S3 dyeing, the grey cloth washed for the second time in S23 is in the dye bath, and the temperature and time of the dye bath are controlled as shown in the following table.

[0139]

[0140] The fabric obtained in Example 19 above was tested for floating color and color stains, and the test results are shown in the following table.

[0141]

[0142] As can be seen from the above table, the fabric obtained in Example 1 of the present application has a higher score for floating color and color stains than the fabric obtained in Example 19, and has less floating color and color stains. This shows that in the dyeing process of the fabric of the present application, by controlling the temperature and time of the dye bath, the floating color and color stains of the fabric can be reduced.

[0143] Comparative Example

[0144] Comparative Example 1

[0145] A dyeing process for fabrics, which is different from Example 1 in that, in S1 preshrinkage, an equal amount of degreaser SL-376N is used to replace degreaser DO-1173, wherein the degreaser SL-376N is purchased from Kunshan Mingjia Additive Co., Ltd.

[0146] Comparative Example 2

[0147] A fabric dyeing process comprises the following steps:

[0148] S1 Degreasing:

[0149] S11 degreaser impregnation: according to the bath ratio of the grey cloth and the degreaser aqueous solution of 1:15, first add water, then add the degreaser DO-1173, stir and mix evenly to obtain a degreaser aqueous solution with a concentration of 3g / L; immerse the grey cloth in the degreaser aqueous solution at 85°C for 20min, then drain the degreaser aqueous solution to obtain the grey cloth impregnated with the degreaser.

[0150] S12 first cleaning: add water according to the bath ratio of grey cloth to water of 1:15, then immerse the grey cloth impregnated with S11 degreasing agent in water at 60°C for 10 minutes, drain the water, and obtain the grey cloth for the first cleaning.

[0151] S13 second cleaning: according to the bath ratio of grey cloth to water being 1:15, water is added, and then the grey cloth cleaned for the first time in S12 is immersed in 40° C. water for 10 minutes, and drained to obtain the deoiled grey cloth.

[0152] The running speed of the grey cloth during degreasing is 80-110 s / r (80 s / r in the embodiment of the present application).

[0153] S2 staining:

[0154] At room temperature (20-25° C.), according to the bath ratio of the grey cloth to the dye bath being 1:15, water is first added to the dyeing machine, and then 2 g / L of the multifunctional synergist DO-3916, 0.5 g / L of the third degreasing agent DO-1173, 0.5 g / L of the dispersant C powder, 0.5 g / L of the chelating agent CA-170, 0.5 g / L of sodium acetate and 0.6 g / L of glacial acetic acid are added, stirred and mixed, and then the temperature is raised to 50° C., and finally 2.65% of the dye WF-PT and 0.0043% of the dye MEKICRON BLUE RSF bsMEKICRON BLUE RSF bs are added, stirred and mixed, and a dye bath is obtained.

[0155] The grey cloth treated with S13 degreasing is added into a dye bath to dye the grey cloth, thereby obtaining the dyed grey cloth.

[0156] Among them, the running speed of the grey cloth treated with S13 degreasing in the dye bath is 80s / r.

[0157] S13 The degreased grey fabric is in the dye bath, and the temperature and time of the dye bath are controlled as follows:

[0158] First, the temperature was increased from 50°C to 70°C at a heating rate of 1°C / min, and then increased from 70°C to 110°C at a heating rate of 0.5°C / min, and kept warm for 15 min; then the temperature was increased from 110°C to 130°C at a heating rate of 0.5°C / min, and kept warm for 30 min; finally, the temperature was decreased from 130°C to 80°C at a cooling rate of 1.5°C / min to obtain the dyed grey cloth.

[0159] S4 reduction cleaning: the same as in Example 1, to obtain the grey cloth treated by the dyeing process.

[0160] Comparative Example 3

[0161] A dyeing process for fabrics, which is different from that of embodiment 1, comprises the following steps:

[0162] S1 Degreasing:

[0163] S11 degreaser impregnation: according to the bath ratio of the grey cloth and the degreaser aqueous solution of 1:15, first add water, then add the degreaser DO-1173, stir and mix evenly to obtain a first degreaser aqueous solution with a concentration of 1g / L; immerse the grey cloth in the first degreaser aqueous solution at 85°C for 20min, then drain the first degreaser aqueous solution to obtain a grey cloth impregnated with the degreaser.

[0164] S12 first cleaning: add water according to the bath ratio of grey cloth to water of 1:15, then immerse the grey cloth impregnated with S11 degreasing agent in water at 60°C for 10 minutes, drain the water, and obtain the grey cloth for the first cleaning.

[0165] S13 second cleaning: according to the bath ratio of grey cloth to water being 1:15, water is added, and then the grey cloth cleaned for the first time in S12 is immersed in 40° C. water for 10 minutes, and drained to obtain the grey cloth treated with the degreasing agent.

[0166] The running speed of the grey cloth during degreasing is 80-110 s / r (80 s / r in the embodiment of the present application).

[0167] S2 Preshrink:

[0168] S21 aqueous solution impregnation: according to the bath ratio of grey cloth and water being 1:15, water was added to the pre-shrinking machine, and the grey cloth treated with S13 degreasing agent was immersed in water at 60°C for 10 minutes to obtain grey cloth impregnated with aqueous solution.

[0169] S22 degreasing agent impregnation: add degreasing agent DO-1173 to the water in S21 to obtain a second degreasing agent aqueous solution with a concentration of 2 g / L; immerse the grey cloth impregnated with the S21 aqueous solution in the second degreasing agent aqueous solution at 60° C. for 5 minutes to obtain a degreasing agent impregnated grey cloth;

[0170] S23 first cleaning: adjusting the pH value of the second degreasing agent aqueous solution in S22 to 7-8 (7 in the embodiment of the present application) to obtain a second degreasing agent aqueous solution with a pH value of 7; immersing the grey cloth impregnated with the degreasing agent in S22 in the second degreasing agent aqueous solution at 60° C. and a pH value of 7 for 5 minutes, heating the temperature to 95° C. at a heating rate of 2° C. / min, and then keeping the temperature for 20 minutes, discharging the degreasing agent aqueous solution with a pH value of 7, and obtaining the grey cloth washed for the first time;

[0171] S24 second washing: according to the bath ratio of grey cloth to water being 1:15, water is added to the pre-shrinking machine, the grey cloth washed for the first time in S23 is immersed in water at 60° C. for 10 minutes, and the water is drained to obtain the grey cloth washed for the second time;

[0172] S25 third cleaning: according to the bath ratio of grey cloth and water being 1:15, water is added to the pre-shrinking machine, and then acetic acid is added to obtain an acetic acid aqueous solution with a concentration of 1g / L; the grey cloth cleaned for the second time in S24 is immersed in an acetic acid aqueous solution at 50°C for 10 minutes, and then drained to obtain the grey cloth cleaned for the third time;

[0173] S26 fourth cleaning: according to the bath ratio of grey cloth to water being 1:15, water is added to the pre-shrinking machine, and the grey cloth cleaned for the third time in S25 is immersed in water at 60° C. for 10 minutes, and then drained to obtain the grey cloth cleaned for the fourth time;

[0174] S27 fifth cleaning: according to the bath ratio of grey cloth to water being 1:15, water is added to the pre-shrinking machine, and the grey cloth cleaned for the fourth time in S26 is immersed in 40° C. water for 10 minutes, and then drained to obtain the pre-shrunk grey cloth.

[0175] The running speed of the grey cloth during preshrinkage is 80-110 s / r (80 s / r in the embodiment of the present application).

[0176] S3 staining:

[0177] At room temperature (20-25° C.), according to the bath ratio of the grey cloth to the dye bath being 1:15, water is first added to the dyeing machine, and then 2 g / L of the multifunctional synergist DO-3916, 0.5 g / L of the third degreasing agent DO-1173, 0.5 g / L of the dispersant C powder, 0.5 g / L of the chelating agent CA-170, 0.5 g / L of sodium acetate and 0.6 g / L of glacial acetic acid are added, stirred and mixed, and then the temperature is raised to 50° C., and finally 2.65% of the dye WF-PT and 0.0043% of the dye MEKICRON BLUE RSF bsMEKICRON BLUE RSF bs are added, stirred and mixed, and a dye bath is obtained.

[0178] The grey fabric pre-shrunk by S27 is added into the dye bath to dye the grey fabric, thus obtaining the dyed grey fabric.

[0179] Among them, the running speed of the grey cloth treated with S27 pre-shrinkage in the dye bath is 80s / r.

[0180] The temperature and time of the S27 pre-shrunk grey fabric in the dye bath are controlled as follows:

[0181] First, the temperature was increased from 50°C to 70°C at a heating rate of 1°C / min, and then increased from 70°C to 110°C at a heating rate of 0.5°C / min, and kept warm for 15 min; then the temperature was increased from 110°C to 130°C at a heating rate of 0.5°C / min, and kept warm for 30 min; finally, the temperature was decreased from 130°C to 80°C at a cooling rate of 1.5°C / min to obtain the dyed grey cloth.

[0182] S4 reduction cleaning: the same as in Example 1, to obtain the grey cloth treated by the dyeing process.

[0183] The fabrics obtained in the above comparative examples 1-3 were tested for floating color and color stains, and the test results are shown in the following table.

[0184]

[0185] As can be seen from the above table, the fabric obtained in Example 1 of the present application has a higher score for floating color and color stains than the fabric obtained in Comparative Example 1, and has less floating color and color stains. This shows that in the dyeing process of the fabric of the present application, the use of degreasing agent DO-1173 in S1 preshrinkage can reduce the floating color and color stains of the fabric.

[0186] As can be seen from the above table, the fabric obtained in Example 1 of the present application has a higher score for floating color and color stains than the fabrics obtained in Comparative Examples 2 and 3, and has less floating color and color stains. This shows that in the dyeing process of the fabric of the present application, the grey cloth is first pre-shrunk and degreased before being dyed, which is beneficial to reducing floating color and color stains of the fabric.

[0187] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed. However, as long as it is within the scope of the claims of the present application, it shall be protected by the patent law.

Claims

1. A dyeing process for improving floating color and color stains on fabrics, characterized in that: The following steps are involved: S1 pre-shrinking: first immersing the grey cloth in water, then immersing it in a first degreasing agent aqueous solution, and finally washing it with water to obtain a pre-shrunk grey cloth; The deoiling agent in the first deoiling agent aqueous solution is deoiling agent DO-1173; S2 degreasing: the grey cloth pre-shrunk in S1 is immersed in a second degreasing agent aqueous solution, and then washed with water to obtain a degreasing grey cloth; S3 dyeing: dyeing the grey cloth treated with degreasing in S2 in a dye bath to obtain a dyed grey cloth; S4 reduction cleaning: performing reduction cleaning on the dyed grey cloth to obtain the grey cloth treated by the dyeing process; In the S1 pre-shrinkage, the concentration of the first degreasing agent aqueous solution is 0.5-2 g / L; In the S2 degreasing, the degreasing agent in the second degreasing agent aqueous solution is degreasing agent DO-1173, and the concentration of the second degreasing agent aqueous solution is 0.5-2g / L; In the degreasing step S2, the grey cloth pre-shrunk in S1 is immersed in a second degreasing agent aqueous solution at a temperature of 80-90°C for 20-30 minutes, then immersed in water at a temperature of 40-60°C for 10-20 minutes, and finally immersed in water at a temperature of 25-40°C for 10-20 minutes to obtain the degreasing grey cloth; In the S3 dyeing, multifunctional synergist DO-3916, degreasing agent DO-1173, chelating agent CA-170 and dispersant C powder are added to water, stirred and mixed, and then dye is added, stirred and mixed to obtain a dye bath; In the S3 dyeing, the concentration of the multifunctional synergist DO-3916 in the water is 1-2 g / L, the concentration of the degreasing agent DO-1173 in the water is 0.5-1 g / L, and the concentration of the dispersant C powder in the water is 0.5-1 g / L.

2. The dyeing process for improving floating color and color stains of fabrics according to claim 1, characterized in that: In the S1 pre-shrinking, the grey cloth is first immersed in water at a temperature of 40-60° C. for 10-20 minutes, then immersed in a first degreasing agent aqueous solution at a temperature of 40-60° C. for 5-10 minutes, and finally washed with water to obtain the pre-shrinked grey cloth.

3. The dyeing process for improving floating color and color stains of fabrics according to claim 1, characterized in that: In the S3 dyeing, the temperature and time of the S2 degreasing grey cloth in the dye bath are controlled as follows: First, increase the temperature from 50°C to 70°C at a heating rate of 0.5-1.0°C / min, then increase the temperature from 70°C to 110°C at a heating rate of 0.5-1.0°C / min, and keep it warm for 10-20 minutes; then increase the temperature from 110°C to 130°C at a heating rate of 0.3-1.0°C / min, and keep it warm for 30-45 minutes; finally, decrease the temperature from 130°C to 80°C at a cooling rate of 1-2°C / min.

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